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WO2018059566A1 - Procédé de transmission de signal, procédé de réception et dispositif - Google Patents

Procédé de transmission de signal, procédé de réception et dispositif Download PDF

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Publication number
WO2018059566A1
WO2018059566A1 PCT/CN2017/104628 CN2017104628W WO2018059566A1 WO 2018059566 A1 WO2018059566 A1 WO 2018059566A1 CN 2017104628 W CN2017104628 W CN 2017104628W WO 2018059566 A1 WO2018059566 A1 WO 2018059566A1
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Prior art keywords
time domain
units
unit
channel
signal
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English (en)
Chinese (zh)
Inventor
蒋创新
陈艺戬
鲁照华
张淑娟
弓宇宏
王瑜新
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]

Definitions

  • the present disclosure relates to the field of wireless communications, and, for example, to a signal transmitting method, a receiving method, and a device.
  • the base station In the Long Term Evolution (LTE) access technology, the base station periodically transmits a synchronization signal and a Physical Broadcast Channel (PBCH), wherein the synchronization signal includes a primary synchronization signal and a secondary synchronization signal.
  • PBCH Physical Broadcast Channel
  • the synchronization signal includes a primary synchronization signal and a secondary synchronization signal.
  • the UE detects the synchronization signal to obtain the synchronization and the cell ID (identification), and then detects the PBCH; after detecting the PBCH, the UE uses the Cell Specific Reference Signals (CRS) to the PBCH. Demodulation is performed to obtain a system broadcast message. Since the synchronization signal and the PBCH are both cell-specific, all user terminals in the cell can be detected, so the synchronization signal, PBCH and CRS are signals and channels that substantially cover the entire cell.
  • CRS Cell Specific Reference Signals
  • the base station uses a wide beam to achieve cell level coverage when transmitting these cell level signals and channels, as shown in FIG. Since the carrier frequency for LTE is basically 6 GHz or less, a wide beam formed using multiple antennas can cover the entire cell. For example, in LTE, both the primary synchronization signal and the secondary synchronization signal are transmitted in a 5 ms period. In each cycle, the base station utilizes a time domain Orthogonal Frequency Division Multiplexing (OFDM) symbol (corresponding The frequency domain includes six physical resource blocks (PRBs) to transmit the primary synchronization signal and the secondary synchronization signal, wherein the beam used for each symbol is a wide beam capable of covering the entire cell.
  • OFDM Orthogonal Frequency Division Multiplexing
  • 5G mobile communication technology not only the carrier frequency band below 6 GHz but also the frequency band above 6 GHz, such as 60 GHz, is supported.
  • the large-scale path loss of 5G mobile communication in the high frequency band is very large, which brings great challenges to wireless communication.
  • 5G mobile communication has a high center frequency and a short wavelength in the high frequency band, so the number of antennas that the base station can accommodate is large, and multiple antennas can be utilized to form a narrow beam to form a beamforming gain. Therefore, narrow beamforming has become an indispensable technology for enhancing cell coverage in high frequency bands.
  • each time domain symbol in one subframe is transmitted through a narrow beam to transmit one or more of a cell-level signal and a channel such as a synchronization signal, a PBCH, a CRS, and a beam reference signal, where different times The domain symbols correspond to different narrow beams.
  • the base station can effectively poll and transmit different narrow beams to cover the entire cell.
  • the beam transmission period can be increased, that is, the beams on different subframes can be different.
  • the present invention provides a signal transmitting method, a receiving method and a device, which can improve utilization of resources on a subframe for transmitting a cell-level signal and/or a channel.
  • a signaling method includes:
  • M beam units carrying the signal and/or channel according to one or more signals and/or channels to be transmitted wherein the signal and/or channel comprises a synchronization signal and/or a broadcast channel;
  • M and N are positive integers and M is less than or equal to N.
  • a signal receiving method includes:
  • the second communication node receives M beam units carrying one or more signals and/or channels on a predefined N time domain units, wherein the signals and/or channels comprise synchronization signals and/or broadcast channels, M And N is a positive integer, M is less than or equal to N;
  • the second communication unit determines a sequence number of the M beam units according to a mapping rule between the N time domain units and a beam unit.
  • a signal transmitting device includes:
  • a determining module configured to determine M beam units carrying the signal and/or channel according to one or more signals and/or channels to be transmitted, wherein the signal and/or channel comprises a synchronization signal and/or a broadcast channel ;
  • a first transmission module configured to send the M beam units on a predefined N time domain units
  • M and N are positive integers and M is less than or equal to N.
  • a signal receiving device includes:
  • the second transmission module is configured to receive M beam units carrying one or more signals and/or channels on the predefined N time domain units, wherein the signals and/or channels comprise synchronization signals and/or broadcast channels , M and N are positive integers, M is less than or equal to N;
  • the beam determining module is configured to: determine a sequence number of the M beam units according to a mapping rule between the N time domain units and the beam unit.
  • a computer readable storage medium storing computer executable instructions arranged to perform the signal transmitting method and/or signal receiving method described above.
  • FIG. 1 is a schematic diagram of transmitting a cell level signal and a channel using a wide beam in the related art
  • FIG. 2 is a schematic diagram of repeatedly transmitting a cell-level signal and a channel by using a plurality of narrow beams in the related art
  • FIG. 3 is a schematic diagram of a mapping relationship between a time domain symbol and a beam in the related art
  • FIG. 4 is a flowchart of a signal sending method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a signal receiving method according to an embodiment of the present invention.
  • 6-a is a schematic diagram showing a mapping relationship between a time domain symbol unit and a beam unit in Embodiment 1;
  • 6-b is a schematic diagram showing a mapping relationship between a time domain symbol unit and a beam unit in Embodiment 2;
  • FIG. 7-a is a schematic diagram showing another mapping relationship between a time domain symbol unit and a beam unit in Embodiment 1;
  • FIG. 7-b is a schematic diagram showing still another mapping relationship between a time domain symbol unit and a beam unit in Embodiment 1;
  • 7-c is a schematic diagram showing another mapping relationship between a time domain symbol unit and a beam unit in Embodiment 2;
  • FIG. 8-a is a schematic diagram showing a mapping relationship between a time domain symbol unit and a beam unit in Embodiment 3;
  • FIG. 8-b is a schematic diagram of another mapping relationship between a time domain symbol unit and a beam unit in Embodiment 3;
  • FIG. 9 is a schematic diagram showing a mapping relationship between a time domain symbol unit and a beam unit in Embodiment 4.
  • FIG. 10-a is a schematic diagram of a beam reverse mapping method in Embodiment 1;
  • FIG. 10-b is a schematic diagram of another beam reverse mapping method in Embodiment 1;
  • 11-a is a schematic diagram of a correspondence between a sequence number of a beam and a random access resource in Embodiment 1;
  • 11-b is a schematic diagram showing another correspondence between the sequence number of the beam and the random access resource in Embodiment 1;
  • 12-b is a schematic diagram of beam mapping of cell #1 in Embodiment 3.
  • FIG. 13 is a schematic diagram of a signal sending apparatus according to an embodiment of the present invention.
  • FIG. 14 is a schematic diagram of a signal receiving apparatus according to an embodiment of the present invention.
  • the embodiment of the invention provides a signal sending method, which can be, but is not limited to, transmitting a cell level signal and a channel.
  • the signal transmitting method is as shown in FIG. 4, and includes steps 100-110.
  • the first communication node determines M beam units carrying the signal and/or channel according to one or more signals and/or channels to be transmitted, wherein the signal and/or channel includes a synchronization signal and / or physical broadcast channel.
  • the first communication node transmits the M beam units on a predefined N time domain units.
  • M and N in the above steps are positive integers, and M is less than or equal to N.
  • the first communication node may be a device of a base station or a similar base station, and may be used to send a cell-level signal/channel such as a physical broadcast channel and a synchronization signal.
  • the signals carried on the M beam units may further include a reference signal for measuring Radio Resource Management (RRM), or a reference signal for measuring the beam and for demodulating the broadcast channel.
  • RRM Radio Resource Management
  • One or more of the cell-level signals such as the reference signal.
  • the physical broadcast channel herein may refer to a channel carrying system parameter information, which may be different from the broadcast channel in LTE, but has a similar effect.
  • the broadcast channel mentioned below is the physical broadcast channel here.
  • the time domain unit is a time domain symbol (ie, a time domain symbol on a physical concept) or a time domain symbol group.
  • One of the time domain symbol groups includes one or more time domain symbols.
  • the beam unit is a beam or a beam group.
  • One of the beam sets includes one or more Beam.
  • the M signals correspond to M beam units. That is, each of the M beam units may include at least the same cell level signal.
  • the N time domain units may be predefined. For example, if the N time domain units can be specified in advance, the base station can no longer use the information to inform the UE of the value of N. Of course, the N time domain units may also be notified by the base station after being predefined by the base station.
  • One of the time domain units may include one or several physical concept time domain symbols.
  • the physical concept time domain symbol mentioned here can be regarded as an OFDM time domain symbol actually included in one subframe or time slot.
  • time domain unit refers to a time domain symbol, that is, includes a time domain symbol; in another case, the time domain unit refers to a time domain unit.
  • a domain symbol group which includes a time domain symbol in a time domain symbol group.
  • a time domain unit may include multiple time domain symbols.
  • the M signals correspond to M beam groups.
  • one beam group corresponds to one time domain symbol group and carries one or more of the above cell level signals. That is to say, one beam group for transmitting these cell level signals such as a broadcast channel, a synchronization signal or a beam reference signal may occupy one or several time domain symbols.
  • the predefined N time domain symbol groups may be all time domain symbols of the subframe, or may be part of the time domain symbols in the subframe.
  • one beam group may include P beams, and the value of P may be explicitly or implicitly indicated to the UE by a broadcast channel in the cell level signal. That is, as long as the UE correctly detects a broadcast channel carried by a certain beam or beam group, the value of P can be obtained.
  • mapping rules may be different or different for different first communication nodes.
  • the signal sending method further includes: determining, by the first communications node, a sequence number of a time domain unit that carries the M beam units according to a mapping rule between the N time domain units and the beam unit, where The time domain unit is in one-to-one correspondence with the beam unit.
  • the mapping rule between the time domain unit and the beam unit may refer to a mapping rule between the sequence number of the time domain unit and the sequence number of the beam unit.
  • the time domain unit may be one or more subframes or all time domain units included in the time slot (ie, N time domain units include all time domain symbols) or may be part or multiple times included in one or more subframes or time slots. Units (ie, N time domain units include a portion of the time domain symbols).
  • the mapping rule between the N time domain units and the beam unit includes: the sequence number of the M beam units is a beam corresponding to a third Z time domain unit from the N time domain units The unit begins with a direction in which the time of the time domain unit decreases or the direction in which the time increases.
  • Z is a positive integer less than or equal to N.
  • Z is equal to 1 and the direction number of the time domain unit decreases, and the sequence numbers of the M beam units are numbered from the last one of the N time domain units.
  • Z is equal to 2 and the direction number of the time domain unit decreases.
  • the sequence number of the beam unit corresponding to the thirteenth time domain unit #12 is #0
  • the sequence number of the beam unit corresponding to the last time domain unit #13 is #13, wherein
  • the time domain unit is the second last time domain unit of the N time domain units, and the M-1 time domain units before the time domain unit.
  • a beam unit corresponding to the time domain unit Numbering in sequence is a reverse numbering method. That is to say, the sequence numbers of the beam units corresponding to the adjacent time domain units are different by one, and the sequence number of the beam unit corresponding to the time domain unit in the preceding time domain position is greater than the sequence number of the beam unit corresponding to the time domain unit behind the time domain position.
  • numbering the beam unit in the direction of increasing time means: the beam unit corresponding to the time domain unit
  • the sequential numbering is performed by sequential numbering. That is to say, the sequence numbers of the beam units corresponding to the adjacent time domain units are different by one, and the sequence number of the beam unit corresponding to the time domain unit in the preceding time domain position is smaller than the sequence number of the beam unit corresponding to the time domain unit behind the time domain position.
  • the value of Z may be different, so that the time domain resources used between different cells may be at least partially offset.
  • some of the first communication nodes may be sequentially numbered, and some of the first communication nodes may be in reverse number.
  • the sending, by the first communications node, the M beam units on the predefined N time domain units may include: when the M is less than N, the first communication node uses the N time domain units Transmitting the M beam units in the last M time domain units; or, when M is less than N, the first communication node sends the M by using the intermediate M time domain units in the N time domain units Beam units.
  • mapping rules such as sequential number or reverse sequence number may be used to determine the sequence number of the beam unit.
  • the first communication node may also send the M beam units by using the first M time domain units of the N time domain units.
  • the method may further include:
  • the first communication node when M is smaller than N, since M beam units can be transmitted with a time domain unit of a part (last, middle or front) of N time domain units, the first communication node can also be Transmitting one of downlink control information, data, channel measurement reference signal, data demodulation reference signal, etc., or the remaining one or more time domain units other than the M time domain units transmitting the M beam units And/or receiving one or more of ACK/NACK, channel measurement reference signal, channel information measurement result, and the like transmitted from the second communication node.
  • the sending, by the first communications node, the M beam units on the predefined N time domain units may include: when M is less than N, the first communication node is in the N time domain units One or more of the M beam units are repeatedly transmitted.
  • the mapping rule described in the foregoing embodiment may be determined according to a physical cell ID and/or a system parameter.
  • the mapping rules corresponding to different cell IDs and/or system parameters may be different.
  • System parameters may include system frame number, system subframe number, and the like. Therefore, the mapping rules corresponding to different subframes may also be different.
  • the mapping rule is known to the base station, and the mapping rule is also known by the UE after determining the cell ID and/or the system parameter.
  • the cell ID and/or system parameters may be known from cell-level signals and/or channels such as synchronization signals, broadcast channels, and the like carried in the beam units detected by the UE.
  • the UE may detect the cell ID, the system subframe number, the system frame number from the broadcast channel, and the like from the synchronization signal.
  • the mapping rule may be predefined or may be default.
  • the UE subsequently selects one or more optimal beam units from the detected beam units, that is, the beam unit with the best quality received at an angle of the cell in which it is located, so that the mapping rule can be learned according to the previously known mapping rules.
  • the embodiment of the present invention further provides a signal receiving method, which can be applied to the UE side. As shown in FIG. 5, the following steps 200 to 210 are included.
  • the second communication node receives M beam units carrying one or more signals and/or channels on a predefined N time domain units, wherein the signals and/or channels include synchronization signals and/or Or broadcast channel, M and N are positive integers, and M is less than or equal to N.
  • the second communication unit determines the sequence numbers of the M beam units according to a mapping rule between the N time domain units and the beam unit.
  • the signal may further include one or more of the following: a reference signal for measuring a radio resource management RRM, a reference signal for measuring a beam, and a reference signal for demodulating a broadcast channel.
  • the time domain unit is a time domain symbol or a time domain symbol group, and the one time domain symbol group includes one or more time domain symbols.
  • the beam unit is a beam or a beam group, and one of the beam groups includes one or more beams.
  • mapping rule between the N time domain units and the beam unit may include:
  • the sequence number of the M beam units is a direction from which the time direction of the time domain unit decreases or the time direction increases from a beam unit corresponding to the Zth time domain unit of the N time domain units. Numbering.
  • the mapping rule is a predefined or default mapping rule, and the beam unit is in one-to-one correspondence with the time domain unit.
  • Z is a positive integer less than or equal to N.
  • the receiving, by the second communications node, the M beam units on the predefined N time domain units includes: when M is less than N, the second communication node is last in the N time domain units
  • the M time domain units or the intermediate M time domain units receive the M beam units.
  • the foregoing signal receiving method may further include: when M is less than N, the second communications node receives the downlink control information on one or more time domain units except the M time domain units.
  • the second communications node receives the downlink control information on one or more time domain units except the M time domain units.
  • ACK/NACK acknowledgment or non-acknowledgement information
  • the receiving, by the second communications node, the M beam units on the predefined N time domain units includes: when M is less than N, the second communication node receives the repetition in the N time domain units One or more of the M beam units.
  • the signal transmitting method and the signal receiving method in the foregoing embodiments may include the following steps 1 to 5.
  • the time domain symbol group is used as the time domain unit
  • the beam group is used as the beam unit
  • the first communication unit is the base station
  • the second communication unit is the UE.
  • each predefined beam or beam group
  • the UE may need to detect the time domain symbol group occupied by N predefined beams (or beam groups) to obtain the cell level information, which may be included in the cell level signal and/or channel.
  • These cell level information may include system parameters such as system frame number, subframe number, cell ID, and the like.
  • the same beam group occupies the same time domain symbol group, which may be a one-to-one correspondence between the beam group and the time domain symbol group. Same time Different time domain symbols in the domain symbol group may correspond to different cell level signals and/or channels, or may correspond to the same cell level signal and/or channel.
  • the base station transmits the cell-level signals and/or channels according to actual conditions, such as a carrier frequency band, a base station antenna, a cell scene, and the like.
  • the number of beam groups actually required by the base station may be less than the number of predefined beam groups, and the base station may only need to transmit bearer cell level signals and/or on some time domain symbol groups in the predefined time domain symbol group.
  • the beam group of the channel That is, the base station may not need to transmit cell level signals and/or channels on all of the predefined time domain symbol groups.
  • the base station may notify the UE of the number M of the time domain symbol groups of the M beam groups and the number P of the beams included in each beam group by using the broadcast channel carried in each beam group, or the base station may The total number of beams M*P transmitted by the base station is notified to the UE.
  • the total number of beams transmitted by the base station or the number of time domain symbol groups and the number of beams in each group may also be sent to the UE through the high layer information after the UE accesses.
  • the one or more subframes have remaining resources, and the base station may be the remaining resources in the one or more subframes.
  • Downlink control one or more of a signal, a channel, a channel measurement reference signal, a data demodulation reference signal, or the like, or receiving a feedback signal such as an ACK/NACK, a channel measurement reference signal, and a channel information measurement result sent by the UE.
  • a feedback signal such as an ACK/NACK, a channel measurement reference signal, and a channel information measurement result sent by the UE.
  • the base station may also repeatedly send one or more of the M beam groups in the N time domain symbol groups. That is, the base station may repeatedly transmit the already transmitted beam group on the remaining resources (one or more time domain symbol groups remaining after subtracting M time domain symbol groups).
  • the correspondence between the sequence numbers of the beam units and the sequence numbers of the time domain units may be different.
  • the base station may not send other signals on the remaining resources.
  • the scheduling methods of the beam groups of different cells are different, and the beam groups of the bearer cell-level signals and/or channels transmitted by different cells are occupied.
  • the time domain symbol group will be different, which can reduce inter-cell interference.
  • the sequence number of the beam group may not be considered in this step. That is to say, the M beam groups carrying the cell level signal and/or channel have no sequence number, but at this time, other signals and/or channels (cell level or non-cell level) can still be transmitted using the remaining resources.
  • a UE that does not access the system obtains a cell-level signal and/or channel carried in the beam group by detecting a corresponding beam group on a predefined time-domain symbol group.
  • the UE may also detect one or more optimal beam groups (or beams), and then obtain cell level, synchronization signal, broadcast channel, and the like from the detected one or more optimal beam groups.
  • Signal and / or channel If the broadcast channel includes the total number of beams sent by the base station, or includes the number of time domain symbol groups and the number of beams included in each beam group, the UE may be sorted according to beam order (eg, sequential or reverse) and The number of beams transmitted by the base station to obtain the sequence number of the best beam.
  • a UE For a UE that has access to the system, it can be determined according to the high-layer signaling configuration or the number of time-domain symbol groups actually remaining in one or more subframes, whether or not the M beams are in the predefined N time-domain symbol groups. Other signals are detected in the remaining time domain symbol groups outside the time domain symbol group occupied by the group. For example, by detecting the broadcast channel, the UE needs to detect the control channel and the corresponding scheduling information on the subframe when there are more than L time domain symbol groups remaining in the subframe, except that the cell-level signal and/or the channel are carried. . L can be predefined or configured as a high-level letter.
  • the UE can learn whether the control channel and the corresponding scheduling information need to be detected on the subframe through the high-layer information. For another example, the UE also needs to determine whether it is necessary to feed back ACK/NACK or channel measurement related information and the like in the remaining last one or several time domain symbol groups according to the scheduling information or the high layer configuration.
  • a UE waiting for a random access response it is also possible to detect a random access response on a subframe in which a cell-level signal and/or channel is transmitted, or a predefined UE does not need to detect a random access response on this subframe.
  • the UE notifies the best one or more beam groups of the base station, that is, the sequence number of one or more optimal beam groups, by explicit or implicit feedback.
  • the sequence number of one or several best beam groups may be notified to the base station by using random access uplink resource locations corresponding to different random access channels.
  • a beam group carries a broadcast channel to be transmitted, a reference signal for measuring a beam, a synchronization signal, etc., and one beam group occupies a time domain symbol group.
  • a transmission unit is a subframe or time slot and includes 14 time domain symbols.
  • the number of pre-defined beams in a subframe or slot is 14 and corresponds to 14 time-domain symbols.
  • the beam group here includes one beam, and the time-domain symbol group includes a time-domain symbol.
  • the UE may need to detect a beam group corresponding to all the predefined time domain symbol groups in the subframe, and each beam in the beam group. By detecting the best beam group or detecting the correct beam group, the UE can obtain the cell level information carried in the cell level signal and/or the channel.
  • one beam group includes one beam
  • one time domain symbol group includes one time domain symbol.
  • the UE may need to detect all predefined time domain symbols in each subframe before it is connected to the system until one or more best ones are detected.
  • Beam Since different beams point in different directions, different UEs may detect different optimal beams. Since the cell-level signals and/or channels carried by different beams may be the same in the same subframe, in the same subframe, even if different UEs detect different optimal beams, they can obtain the same. Cell level signals and/or channels.
  • the period of a subframe carrying a cell level signal and/or channel may be predefined. For example, the period is X subframes, then these cell level signals and/or channels can be transmitted in subframe #0, subframe #X, subframe #2X....
  • the base station can determine the number of beams according to different situations. If there are more antenna elements in the high frequency band, the transmitted beam is relatively narrow. If the transmitted beam can cover the entire cell, a larger number of beams are needed. Since the number of beams is large, the number of time domain symbols occupied is large, so the transmission period of the beam is lengthened.
  • each time domain symbol corresponds to one beam, that is, one beam group includes one beam and one time domain symbol group includes one time domain symbol. No. Then, in two subframes, 28 time domain symbols can be used to transmit beams of 28 different directions.
  • the transmission period of the beam in the above example can be known explicitly or implicitly through the detected broadcast channel.
  • the transmission period of the beam is one subframe, it can be considered that the predefined 14 time domain symbol groups, that is, N is equal to 14, and the number of beam groups transmitted by the base station in one transmission period is not greater than 14. If the transmission period of the beam is two subframes, it can be considered that the predefined 28 time domain symbol groups, that is, N is equal to 28, and the number of beam groups transmitted by the base station in one transmission period does not exceed 28, of course. It can be considered that the number of predefined time domain symbol groups in one subframe is 14, and the number of beam groups transmitted by the base station in this subframe does not exceed 14.
  • the transmitted beam is very wide, for example, one beam can cover the entire cell.
  • the base station can transmit only one beam to carry these cell level signals and/or channels. If the transmission period of this beam is one subframe and the beam (or beam group) is mapped on one time domain symbol (or time domain symbol group), then the remaining 13 time domain symbols are not used to transmit the beam.
  • the broadcast channel carried by each beam group includes the number of beam groups transmitted by the base station.
  • the base station When the base station transmits these cell level signals and/or channels, the base station utilizes as much as possible a specific portion of the predefined N time domain symbol groups. If there are few beam sets required for actual transmission, the base station may transmit other signals using the remaining time domain symbols other than the time domain symbols occupied by the M beam groups carrying these cell level signals and/or channels.
  • the base station when M is less than N, the base station sends the M beam groups by using the last M time domain symbols in the N time domain symbols. For example, the base station can transmit these cell level signals and/or channels using the last time domain symbols in a transmission subframe. As shown in Figure 6-a, the base station actually transmits only one beam and transmits the beam on the last time domain symbol (on-the-field symbol #13) of the transmission subframe. As shown in Figures 7-a and 7-b, the base station actually transmits 2 beams and places them on the last 2 time domain symbols of the subframe. As shown in Figure 7-a, the time domain symbol #12 transmits beam #0, and the time domain symbol #13 transmits beam #1. As shown in FIG. 7-b, the time domain symbol #0 is used to transmit the beam #13, and the time domain symbol #12 is used to transmit the beam #1, and the time domain symbol #13 is transmitted to the beam #0.
  • the base station may send one or more of the downlink control information, the data, the channel measurement reference signal, and the data demodulation reference signal, or receive, on other time domain symbols in the N time domain symbols. From the ACK/NACK, channel measurement reference signal, and channel information measurement result sent by the UE One or more. For example, the base station may use up to the first 13 time domain symbols in each transmission subframe (as shown in FIG. 6-a) or up to the first 12 time domain symbols (as shown in FIGS. 7-a and 7-b) to send the downlink control channel and downlink. Or uplink data information and reference signals.
  • the last one or several time domain symbols may also be reserved for the ACK/NACK sent by the accessed UE. SRS and so on.
  • mapping rule of the beam and the time domain symbol shown in the above figure may be predefined or defaulted, wherein the time domain unit has a one-to-one correspondence with the beam unit.
  • a mapping rule is that the sequence numbers of the M beam units may be from the inverse Zth time domain unit of the N time domain units, and the direction or time of decreasing the time of the time domain unit increases. Numbering. Where Z is a positive integer less than or equal to N.
  • the sequence numbers of the beams are sorted sequentially from the time domain symbols defined by the mapping rules.
  • a total of two transmit beams beam #0 is transmitted in time domain symbol #12, and beam #1 is transmitted in time domain symbol #13, that is, the base station is the second from the last of the subframe.
  • the un-accessed UE detects the predefined M beams (or beam groups), at least the best beam is detected.
  • the best beam is the beam on the time domain symbol #12 in Figure 7-a, and then The broadcast channel carried by the beam knows that the number of beams transmitted by the base station is two, and since all the beams actually transmitted are placed on the last M time domain symbols of the subframe, the UE can calculate the sequence number of the beam corresponding to the time domain symbol #12. Yes #0.
  • FIG. 7-b or 10-a Another mapping rule is shown in Figure 7-b or 10-a.
  • a beam carrying a cell level signal and/or channel is transmitted on a total of two time domain symbols, beam #0 is transmitted in time domain symbol #13, and beam #1 is transmitted in time domain symbol #12.
  • the UE detects at least the best beam, for example, the corresponding time domain symbol #12 in FIG. 7-b, so the UE can calculate that the sequence number of the beam corresponding to the time domain symbol #12 is #1.
  • the period of beam transmission is one subframe.
  • the beam numbers are cumulatively ordered during one transmission period of the beam. If the base station transmits a beam group greater than 14 and less than 28, after detecting the best beam, the UE can obtain the best beam (or The number of beams transmitted by the base station is known to the broadcast channel carried by the best beam group, for example, 16. At this time, the base station can learn according to the mapping rule that the base station may transmit the first 14 beams in the first transmission subframe and 2 beams in the last two time domain symbols in the second subframe. The remaining 12 time domain symbols in front of the second subframe can also be used to transmit other signals.
  • the UE that is not accessed may use the random access resource information detected through the broadcast channel or other channels to feed back the selected beam sequence number through the random access channel.
  • Base station For example, the base station may allocate multiple random access resources to the UE through a broadcast channel or in a predefined manner. In a random access period, different random access resources correspond to different beam numbers. The UE may select different random access resources to indicate the sequence number of the beam selected by the base station.
  • beam sequence numbers and random access resources There are two types of beam sequence numbers and random access resources: first, the small sequence number corresponds to the random access resource in the front of the time domain, as shown in Figure 11-a; second, the large sequence number corresponds to the time domain. The previous random access resources are shown in Figure 11-b.
  • these UEs may also It is necessary to detect information such as downlink control signals or data that may be included in this transmission subframe. That is to say, for this transmission subframe, the UE can assume that there may be data transmission on it. L can be obtained through high-level signaling, or the UE can directly learn from the high-level information whether it is necessary to continue to detect downlink control information, data, and the like that may exist in the subframe.
  • the base station sends the M beams (or beam groups) by using the M M time-domain symbols in the N time-domain symbols, that is, the base station uses one transmission.
  • the cell-level signals and/or channels are transmitted in the subframe except for the last one or several time-domain symbols and the remaining portion of the first or several time-domain symbols.
  • the base station transmits only one beam and places it in the second to last time domain symbol of the subframe (instant field symbol #12).
  • the base station may utilize other time domain symbols in each transmit subframe other than time domain symbol #12 to transmit other signals.
  • the time domain symbols #0 to #11 are used to transmit a downlink control channel, a downlink data channel, or a downlink channel sounding reference signal, and the like.
  • Time domain symbol #13 can be used to receive feedback such as channel information, ACK/NACK, and the like. In this way, a self-contained sub-frame structure can be implemented. That is, the UE can receive the information sent by the base station through one or more of the time domain symbols #0 to #11. The data channel for the previous time domain symbol and the measurement result of the channel sounding reference signal or ACK/NACK and the like can be fed back by the time domain symbol #13.
  • the base station actually transmits 2 beams, which are placed in the penultimate and third-to-last time domain symbols of the subframe, that is, the time domain symbol #11 is used to transmit the beam #1, the time domain symbol. #12 ⁇ #0.
  • the base station can transmit other signals in the subframes except for the symbols #11 and #12 in each cell level to transmit other signals.
  • a mapping rule between a beam and a time domain symbol is shown in Figure 7-c.
  • the base station transmits two beams, beams #0 and #1. Beam #0 is transmitted on time domain symbol #12, and beam #1 is transmitted on time domain symbol #11.
  • the UE that is not accessed will detect at least the best beam (or the best beam group).
  • the best beam is the beam corresponding to the time domain symbol #11 in Figure 7-c, and then from this beam.
  • the carried broadcast channel knows that the number of beams actually transmitted by the base station is two, and according to the mapping rule, it can be known that the sequence numbers of all the beams are reversed from the time domain symbol #12, so the UE can calculate the beam corresponding to the time domain symbol #11.
  • the serial number is #1.
  • the base station can transmit only one beam to carry these cell level signals and/or channels. That is, when a time domain symbol group corresponds to one beam group, assuming that a time domain symbol group includes a time domain symbol, then the remaining 13 time domain symbols are not used to transmit and carry the cell level signals and / or the beam of the channel.
  • the mapping rules between the beams carrying the cell-level signals and/or channels and the time-domain symbols in different cells may be different.
  • the values of Z may be different for different base stations.
  • the mapping rules are determined based on the cell ID. As shown in FIG. 8-a, in cell #0, the sequence number of the beam is sequentially increased from the time domain symbol #0, and in the cell #1, the sequence number of the beam is from the time domain symbol #2. The increment of the sequence number of the domain symbol is increased, and then recycled to the time domain symbol #0 and the time domain symbol #1.
  • the number of beams carrying cell-level signals and/or channels transmitted by cells #0 and #1 is two.
  • the UE detects that the best beam is in time domain symbol #1 and passes through the best beam.
  • the broadcast channel can know that the number of beams transmitted by the base station is 2, then the UE can transmit according to multiple beams and start from the time domain symbol #0 (which can be predefined) to derive the best.
  • the serial number of the beam is beam #1.
  • the UE detects that the best beam is in time domain symbol #3, and through the broadcast channel on the best beam, it can be known that the number of beams transmitted by the base station is 2, then the UE can be continuous according to multiple beams.
  • the transmitted beam is transmitted from the time domain symbol #2, and the sequence number of the optimal beam is estimated to be beam #1.
  • the base station can transmit the beam on any time domain symbol.
  • beams or beam groups can be transmitted on different time domain symbols or time domain symbol groups for different cells.
  • the remaining time domain symbol groups may not be used to send any signals.
  • the beams transmitted by different cells may not overlap or partially overlap, so that mutual interference between beams in different cells is greatly reduced.
  • the sequence numbers of the beams may be sequentially sorted across the subframes.
  • the ordering of the beams is cumulatively superimposed from the first subframe to the second subframe.
  • the order of the beams is sorted from the time domain symbol #2 of the first subframe, and then the time domain symbols of the second subframe are superimposed and superimposed. Time domain symbols #0, #1 to the first subframe.
  • the transmission period of the beam may be directly notified by the base station to the UE, or may be calculated according to the number of beams transmitted by the base station. For example, when a beam is included in a beam group, if it is known that the base station transmits 16 beams (greater than 14 and less than 28), the UE can know that the beam transmission period is 2 subframes. For example, a beam group includes 8 beams, and one subframe can transmit up to 14*8 beams. Thus, according to 16 less than 14*8, the UE can know that the beam transmission period is one subframe.
  • mapping rules may also be determined according to other parameters, such as system frame number, system subframe number, and the like.
  • the mapping rules may be different for different system subframe numbers. For example, for cell #0 with two beams to be transmitted, on subframe n1, two beams, beam #0 and beam #1, may be mapped on time domain symbol #0 and time domain symbol #1, respectively. On subframe n2, beam #0 and beam #1 may be mapped on time domain symbol #2 and time domain symbol #3, respectively.
  • beam #0 and beam #1 can be mapped on time domain symbol #4 and time domain symbol #5, respectively, and on subframe n2, beam #0 and beam #1 can be respectively Maps in time domain symbol #0 and time domain symbol #1.
  • mapping rule of the beam can also be independent of the cell ID or other parameters, and the mapping rule can be predefined or default, and does not need to be changed.
  • the base station may repeatedly send the already transmitted beam group on the time domain symbol group except the M time domain symbol groups in the predefined N time domain symbol groups. One or more of them. That is, when M is less than N, the first communication node may repeatedly transmit one or more of the M beam groups in the N time domain symbol groups.
  • one beam group includes one beam
  • one time domain symbol group includes one time domain symbol.
  • the base station determines that it is necessary to transmit a cell-level signal and/or channel according to actual conditions (carrier frequency band, number of base station antennas, etc.). The number of beams is 12, and the base station can repeatedly transmit beam #0 and beam #1 on the remaining two time domain symbols.
  • the remaining time domain symbols can be used to repeatedly transmit different one or more beams. For example, in subframe #0, the remaining two time domain symbols can be used to transmit beam #0 and beam #1, while in subframe #X, the remaining time domain symbols can be used to transmit beam #2 and beam #3 .
  • one beam group may include multiple beams and be transmitted on one time domain symbol. For example, if a beam group includes 8 beams, then a subframe for transmitting cell-level signals and/or channels can transmit up to 14 beam groups, that is, 14*8 beams. The number of beam groups in one transmission period and the number of beams included in one beam group may be implicitly notified to the UE through a broadcast channel or other signals.
  • sequence numbers of the beams can be sorted in at least two ways:
  • the sequence numbers of the beams can be first sorted according to the time domain symbol group and then increased within the beam group. For example, when the reverse mapping rule is used, if there are 2 beam groups and a total of 16 beams are to be transmitted, then in the example of FIG. 7-b, the beam on the time domain symbol #13 includes: beam #0, #2 , #4, #6, #8, #10, #12, #14; The beam on the time domain symbol #12 includes: beam #1, #3, #5, #7, #9, #11, #13,#15.
  • the beam sequence number can be first added to the beam group and then sorted according to the time domain symbol group. For example, when using the reverse mapping rule, if there are 2 beam groups and a total of 16 beams are to be transmitted, then in the example of FIG. 7-b, the beam on the time domain symbol #13 includes: beam #0, #1 , #2, #3, #4, #5, #6, #7; The beam on time domain symbol #12 includes: beam #8, #9, #10, #11, #12, #13, #14 , #15.
  • one time domain symbol group may include multiple time domain symbols, that is, one beam group may correspond to multiple time domain symbols.
  • different time domain symbols may correspond to different cell level signals and/or channels.
  • two time domain symbols correspond to one beam group, such that a subframe for transmitting a cell level signal and/or channel may include up to 7 beam groups.
  • the first time domain symbol can carry a synchronization signal
  • the second time domain symbol can carry a broadcast channel.
  • the embodiment of the invention further provides a signal sending device, which can be disposed in the first communication node (for example, a base station). As shown in FIG. 13, the determining module 131 and the first transmitting module 132 are included.
  • the determining module 131 is configured to determine M beam units carrying the signal and/or channel according to one or more signals and/or channels to be transmitted, wherein the signal and/or channel comprises a synchronization signal and/or a broadcast channel .
  • the first transmission module 132 is configured to transmit the M beam units on a predefined N time domain units.
  • M and N are positive integers and M is less than or equal to N.
  • the signal may further include one or more of the following: a reference signal for measuring the RRM, a reference signal for measuring the beam, and a reference signal for demodulating the broadcast channel.
  • the time domain unit is a time domain symbol or a time domain symbol group, and the one time domain symbol group includes one or more time domain symbols.
  • the beam unit is a beam or a beam group, and one of the beam groups includes one or more beams.
  • mapping rules are the same or different for different first communication nodes.
  • the determining module 131 may further determine, according to a mapping rule between the N time domain units and the beam unit, a sequence number of a time domain unit that carries the M beam units, where the time domain unit One-to-one correspondence with the beam unit.
  • the mapping rule between the N time domain units and the beam unit may include: the sequence number of the M beam units is corresponding to a third Z time domain unit from the N time domain units
  • the beam unit begins with a direction in which the time of the time domain unit decreases or a direction in which the time increases, where Z is a positive integer less than or equal to N.
  • the Z may be different for different first communication nodes.
  • the first transmission module 132 may be configured to: when the M is smaller than N, send the M beam units on the last M time domain units or the intermediate M time domain units of the N time domain units. .
  • the first transmission module 132 is further configured to: when M is smaller than N, send downlink control information, data, and channel on one or more time domain units except the M time domain units. Measuring one or more of the reference signal, the data demodulation reference signal, or receiving one or more of acknowledgment or non-acknowledgement information, channel measurement reference signal, channel information measurement result.
  • the first transmission module 132 is further configured to: M is less than N, and then repeatedly send one or more of the M beam units on the N time domain units.
  • the embodiment of the invention further provides a signal receiving device, which can be disposed in the second communication node (for example, a UE). As shown in FIG. 14, the second transmission module 141 and the beam determination module 142 are included.
  • the second transmission module 141 is arranged to receive M beam elements carrying one or more signals and/or channels on a predefined N time domain units.
  • the signal and/or channel comprises a synchronization signal and/or a broadcast channel, M and N being positive integers and M being less than or equal to N.
  • the beam determining module 142 is configured to determine the sequence numbers of the M beam units according to mapping rules between the N time domain units and the beam units.
  • the signal may further include one or more of the following: a reference signal for measuring the RRM, a reference signal for measuring the beam, and a reference signal for demodulating the broadcast channel.
  • the time domain unit is a time domain symbol or a time domain symbol group, and the one time domain symbol group includes one or more time domain symbols;
  • the beam unit is a beam or a beam group, and one of the beam groups includes one or more beams.
  • the mapping rule between the N time domain units and the beam unit includes: the sequence number of the M beam units is a beam corresponding to a third Z time domain unit from the N time domain units The unit begins with a direction in which the time of the time domain unit decreases or the direction in which the time increases.
  • the mapping rule is a predefined or default mapping rule, and the beam unit is in one-to-one correspondence with the time domain unit.
  • Z is a positive integer less than or equal to N.
  • the second transmission module 141 may be configured to receive M beam units on the predefined N time domain units as follows: M is less than N, then the last M of the N time domain units The M beam units are received on a time domain unit or an intermediate M time domain units.
  • the second transmission module 141 may be further configured to: if the M is smaller than N, in the N time domain units, one or more time domain units except the M time domain units. Receiving one or more of the downlink control information, the data, the channel measurement reference signal, and the data demodulation reference signal, or transmitting one or more of the acknowledgement or non-acknowledgement information, the channel measurement reference signal, and the channel information measurement result. .
  • the second transmission module 141 is further configured to set M to be smaller than N, and then repeatedly receive one or more of the M beam units on the N time domain units.
  • the above signal transmitting/receiving method and device thereof can determine the sequence number of the beam transmitting the cell level signal and/or the channel according to a predefined time domain unit and a mapping rule between the time domain unit and the beam unit, so that the actual transmission signal
  • the number of beam units or the number of time domain units used by the channel and/or channel may be less than the number of predefined beam units or the number of time domain units.
  • the remaining resources on the subframe can be used to transmit other signals to improve resource utilization.
  • different cells may be selected to send fewer beams for different cells. For example, different cells adopt different mapping rules between beams and time domain symbols, which may reduce interference between cells.
  • beams carrying cell level signals and/or channels may be repeatedly transmitted on time domain symbols.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, the computer executable instructions being arranged to perform any of the above signal transmission methods.
  • the computer-executable instructions when executed, perform operations of determining M beam units carrying the signals and/or channels in accordance with one or more signals and/or channels to be transmitted, wherein the signals and/or Or channel includes a synchronization signal and/or a broadcast channel; transmitting the M beam units on a predefined N time domain units; Where M and N are positive integers and M is less than or equal to N.
  • the computer readable storage medium can be disposed on the first communication node.
  • Another embodiment of the present invention provides a computer readable storage medium storing computer executable instructions configured to perform any of the above signal receiving methods.
  • the computer-executable instructions when executed, perform operations of receiving M beam elements carrying one or more signals and/or channels on a predefined N time domain units, wherein the signals and/or The channel includes a synchronization signal and/or a broadcast channel, M and N are positive integers, and M is less than or equal to N; and the sequence numbers of the M beam units are determined according to a mapping rule between the N time domain units and beam units.
  • the computer readable storage medium can be disposed on the second communication node.
  • a signal transmitting method, a signal receiving method, and a corresponding device thereof are provided.
  • a time domain unit and a number of beam units transmitted thereon By predefining a time domain unit and a number of beam units transmitted thereon, a subframe for transmitting a cell level signal and/or a channel can be improved. Utilization of resources.

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Abstract

L'invention concerne un procédé de transmission de signal, un procédé de réception de signal, et un dispositif. Le procédé de transmission de signal comprend les étapes suivantes : un premier nœud de communication détermine, selon un ou plusieurs signaux à émettre et/ou des canaux, M unités de faisceau portant les signaux à émettre et/ou les canaux, les signaux à émettre et/ou les canaux comprenant un signal de synchronisation et/ou un canal de diffusion ; et le premier nœud de communication transmet sur N unités de domaine temporel préconfigurées, les M unités de faisceau, M et N étant des nombres entiers positifs, et M étant inférieur ou égal à N.
PCT/CN2017/104628 2016-09-29 2017-09-29 Procédé de transmission de signal, procédé de réception et dispositif Ceased WO2018059566A1 (fr)

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